Speaker mounting device



July 24, 1962 TADASHI IGARASHI SPEAKER MOUNTING DEVICE Filed March 25,1959 All,

IN VEN TOR. fg aras/2 A TT NE YS Taams/ BY nog @Mfg alf United StatesPatent O 3,045,776 SPEAKER MUUNTING DEVIICE Tadashi Igarashi,Suginami-ku, Tokyo, Japan, assignor to Sony Kabushikihaisha (SonyCorporation), Tokyo, Japan, a corporation of Japan Filed Mar. 25, 1959,Ser. No. $01,393 Claims priority, application Japan Apr. 16, 1953 1Claim. (Cl. Isl-31) This invention relates to a speaker mounting device,and more particularly to such -a device for mounting a speaker to apanel or 1a front plate of a radio receiving set.

In `a heretofore known speaker mounting device for a small portableradio set, it has been usual to mount a speaker to a. panel or a frontplate of a oase from the inner side thereof.

It is, therefore, necessary to provide a `cas-e having a 'depth largeenough to receive the whole length of a speaker.

IIt is Ian object of this invention to provide a speaker mounting devicein which the speaker `can be tted into ya window or opening formed in apanel or front plate of a case, from the outside thereof so that thedepth of the case can -be m-ade as small as possible.

It is another object of this invention to provide a speaker mountingdevice in which at least the front surface of la speaker is disposed tobe the same plane as that of the panel or be slightly extended from theoutside fa-ce of the panel so that the depth of the case may becorrespondingly minimized.

It is ya further object of this invention to provide a radio receivingset such as a small portable transistor radio receiving set in which 1aspeaker can be removed and mounted from the outside of the case andinspection of the same can easily be attained from the outside of thecase.

Other objects, features, and advantages of this invention will be moreapparent from the following detailed description taken in connectionwith the accompanyingY drawing.

FIGURE 1 is a cross-sectional view of a speaker constructed and mountedin a case in laccordance with this invention;

FIGURE 2 is an enlargement of a portion of the sectional view of FIGURE1;

FIGURE 3 is ya cross-sectional view, on a reduced scale, takensubstantially along line III-III of FIG- URE 1; and

FIGURE 4 .is a partial cross-sectional View taken along line IV-IV ofFIGURE 2.

Referring to the drawing, 1 is a case of a small and portable radioreceiving set such as a transistor radio receiver and 2 a front plate ora panel of the case. Reference numeral 3 generally designates a speakerwhich includes a conventional frame 4.

In accordance with this invention the speaker 3 is put into the casepassing through 1a window or opening 6 formed on the panel 2 until theback face 5a of a flange 5 formed at the periphery of the frame 4 abutsan outer face portion 2a of the panel 2 :about the opening 6,

The ilange is then secured to the panel by means of screws 7, ifdesired. The panel '2 is provided with an integral ring portion 8projecting outwardly from the outer face of the panel 2 and spacedradially outwardly from the edge of the opening 6 in coaxial relationthereto.

The ange 5 has a peripheral edge portion 12, the radially outwardlyfacing surface 12a thereof `being engaged with the radially inwardlyfacing surface 8a of the ring portion 8. The outer edge 9a of lagenerally conical diaphragm 9 is pressed on the front face 5b of theflange 5 by a cushion ring l0 `such as made of felt and rubber, theradially outwardly facing surface 10a of the ring 10b attached to theradially inwardly facing surface 12b of the peripheral edge 12 of theange 5.

On the peripheral edge 12 and the cushion ring 10 can be arranged adecoration plate, fabric salan or grille 12 to protect the diaphragm 9.

lThe speaker is held in position by -a cover 11 having lugs 13 which areextended from spaced points of the peripheral edge thereof and insertedinto corresponding recesses 14 formed in the plate 2 outside the ring 8and then the end of the lugs Iare bent inwardly as shown in the drawing.

It will be apparent that the depth or height of the case can beminimized in this invention by at least the width of the panel '2 or thetotal sum widths of the flange 5, cushion ring 10 and the cover 11 ascompared with an ordinary radio set.

It has been appreciated in `a portable radio apparatus that thedimension especially the width or the height of the case of the`apparatus is possibly minimized.

The construction and arrangement according to this invention enables tomake compact the assembly of the portable radio apparatus to meet theabove mentioned desire.

Besides, according to this invention, the speaker can readily be mountedto and removed from the panel of the case from the outside of the case.

The inspection of the inner connections, parts and speaker itself canalso easily be made by removing the speaker, `as desired.

While I have explained a particular embodiment of my invention, it willbe understood, of course, that I do not wish to be limited thereto sincemany modications may be made and `I, therefore, contemplated by theappended claims to cover vany such modifications as fall within thespirit and scope of my invention.

What I claim is:

In an electro-acoustical device, a transducer including la frame and agenerally conical diaphragm in said frame, a flange formed at theperiphery of said frame `and having a back face and a front face, facase including a panel having ran opening therein receiving saidtransducer with said back face being engaged with the outer face of saidpanel about said opening, a cushion ring holding a peripheral portion ofsaid diaphragm against said front face, van integral forwardly extendingperipheral edge portion formed on said flange outside said cushion ring,a grill having a peripheral edge portion disposed `against the outerface of said cushion ring, an outer ring projecting outwardly from saidpanel in surrounding relation to said integal forwardly extendingperipheral edge portion on said ange, a cover ring engaging theperipheral edge portion of said grill to hold said grill and cushionring in position, said panel having recesses therein outside said outerring, and lugs extending inwardly from said cover ring through saidrecesses with the inner ends of said lugs being bent radially inwardlyto hold said rings and said grill in position.

References Cited in the file of this patent UNITED STATES PATENTS1,932,459 Harris Oct. 31, 1933 1,970,837 Bowley Aug. 21, 1934 2,020,705Stenger Nov. 12, 1935 2,821,260 Shaffer Ian. 28, 1958 2,848,059 HahnAug. 19, 1958 2,853,145 Martin Sept. 23, 1958 2,974,204 Supitilov Mar.7, 1961

